I was running the "Generate Coins" feature of Bitcoin. I have not opened up port 8333. It says it has 8 connections, and the number of blocks just keeps going up and up. (It's over 50,000). It hasn't generated any coins yet.

I'd like to use this feature, but I'm not sure what to set in my Linksys WRT54G router. I think it's the Applications and Gaming section I want, and the following is what I entered. But I don't know about the "Port In" and "Dest. Port" difference. Should they both be 8333 like I have them here?

yeah, usually you just forward the inbound port to the same destination port.that only differs if you run a service locally with a certain port, but you want people to connect to the service via another port.this scenario wont really apply to the normal computer user.